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Home My WebLink About1978-06-07 Septic System Soil Boring ReportJune 7, 1978 Mr. Lester Kelly 125 South Brown Road Long Lake, Minnesota 55356 545 Indian Mound Wayzata, Minnesota 55391 (612)473-4224 Re: Percolation Tests for Subdivision Platting, Orono, Minnesota Job Number 11-78-25 Dear Mr. Kelly: Enclosed is information requested in regards to the suitability of Parcels 2 and 3 for on-site sewage treatment. The drainfield information is based on percolation tests and soil borings performed on May 23, 24, and 25, 1978. Parcel. 2 The soils found on Parcel 2 are Glencoe silty clay loam, Hamel loam and Lester loam. These suils are mapped in Figure 1. The percola- tion rate for the primary field as tested was 9.7 minutes/inch. The percolation rate for the secondary field as tested was 7.3 minutes/ inch. The location of the percolation test holes, soil borings, and the proposed drainfield areas are indicated in Figure 1. Percolation rates and depths to the water table are shown in Table 1. The soil logs of the soil borings are shown in Table 2. An "innovative shallow trench system" or a mound system is recommend- ed for both the primary and secondary drainfield sites. These sys- tems will allow for the required 3.0' separation between the bottom of the drainfield and the water table. The soil borings taken at the primary and secondary drainfield sites indicate that the water table is at a depth of 4.0' or greater. I have enclosed an el<,v:i- ' view of such a system. Parcel 3 The soils found on Parcel 3 are Glencoe silty clay loam, Hamel loam and Lester loam. These soils are mapped in Figure 1. The percola- tion rate for the primary field as tested was 6.5 minutes/inch. The } percolation rate for the secondary field as tested was 11.5 minutes/ !rich. The location of the percolation test holes, soil torings, and proposed drainfield areas are indicated in Figure 1. Percolation rates and depths to the water table are shown in Table 1. The soil logs of the soil borings are shown in Table 2. n { j x Re: Percolation Tests for Subdivision Platting, Orono, Minnesota Job Number 11-78-25 Dear Mr. Kelly: Enclosed is information requested in regards to the suitability of Parcels 2 and 3 for on-site sewage treatment. The drainfield information is based on percolation tests and soil borings performed on May 23, 24, and 25, 1978. Parcel. 2 The soils found on Parcel 2 are Glencoe silty clay loam, Hamel loam and Lester loam. These suils are mapped in Figure 1. The percola- tion rate for the primary field as tested was 9.7 minutes/inch. The percolation rate for the secondary field as tested was 7.3 minutes/ inch. The location of the percolation test holes, soil borings, and the proposed drainfield areas are indicated in Figure 1. Percolation rates and depths to the water table are shown in Table 1. The soil logs of the soil borings are shown in Table 2. An "innovative shallow trench system" or a mound system is recommend- ed for both the primary and secondary drainfield sites. These sys- tems will allow for the required 3.0' separation between the bottom of the drainfield and the water table. The soil borings taken at the primary and secondary drainfield sites indicate that the water table is at a depth of 4.0' or greater. I have enclosed an el<,v:i- ' view of such a system. Parcel 3 The soils found on Parcel 3 are Glencoe silty clay loam, Hamel loam and Lester loam. These soils are mapped in Figure 1. The percola- tion rate for the primary field as tested was 6.5 minutes/inch. The } percolation rate for the secondary field as tested was 11.5 minutes/ !rich. The location of the percolation test holes, soil torings, and proposed drainfield areas are indicated in Figure 1. Percolation rates and depths to the water table are shown in Table 1. The soil logs of the soil borings are shown in Table 2. June 7, 1978 Mr. Lester Kelly Page Two A conventional septic system is recommended for the primary drain - field site provided that a 3' verticle separation is maintained be- tween the bottom of the drainfield trenches and the water table. The soil borings taken at the primary drainfield site indicate that the water table is at a depth of -5.1' or greater. An "innovative shallow trench system" i ondar, site. This system will allow for tion between the bottom of the drainfield Soil borings indicated that the depth to or greater. Sincerely, recommended f 3r the sec - the required 3.0' separa- and the water ta')le. the water ta':)le is 4.0' any questions, please do not hesitate to contact me.'�- EUGENE A. HICKOK & ASSOCIATES James P. DeBenedet, P.E. JPD/jel Enclosures _g 4q __% / 40, L .p )� EP'�Ef1ErJ pr .,...v . u 1 •u�,4 1 ' LESIEIZ II LESTcI Lo Kr i k 4�w' wart Z, oQ f(l(f Cf�>EJ �o� c�-I� 0l1 I�LENC-oE 4 SI'f E SI LTi CLPY \ Llow a \+ ,\ +`S) Pte- I 3 6 -b , iLa \ r oo TEST 4ioLE S lt� F�of :; I' - L r>,I lof,ff o PV.IG. Opxk, X SOIL &CONL- E.A. HICKOK c?t ASSOCIATES HYDROLOGISTS": C- iHEER33 MINNEAPOLIS -M. INNESOTA TABLE 1 PERCOLATION RATES AND DEPTH TO WATE11 TABLE PARCEL 2 -- (no lot) Hole Material 1 Fine sandy clay 2 Clayey sand 3 Clayey sand 4 Clayey sand 5 Clayey sand 6 Fine sandy clay Sbl 4.0' Sb2 = 7.3 Sb3 min/inch Percolation Rate Minutes/Inch 21.8 5.0 8.8 8.3 8.6 20.0 Depth to Water Table 5.5'(mottling rate at 4.0' primary field (holes 1, 6.0'(mottling - 9.7 at 5.0' Percolation 5.0'(mottling of at 4.0' 4, 5) Percolation rate of the primary field (holes 1, 2, 5, 6) - 9.7 Clayey min/inch Percolation rate of the secondary field (2, 31 4, 5) = 7.3 sand min/inch *See soil logs of soil bcring. PARCEL 3 - Hole Material 1 Clayey sand 2 Clayey sand 3 Clayey sand 4 Clayey sand 5 Fine sandy clay 6 Clay -ay sand Sbl Sb2 Sb3 Percolation Rate Minutes/Inch 3.7 7.3 10.0 10.9 43.5 5.5 Depth to Water Table Greater than 8.0' I (mottling at 6.5') 7.0'(mott-ling at 5.1 4.0 (mottling at 4.5 Percolation rate of the primary field (holes 1, 2, 51 6) = 6.5 min/inch Percolation rate of the secondary field (2, 3, 4, 5) = 11.5 min/inch *See soil logs of soil boring. TABLE 2 SOIL LOGS PARCEL 2 - SOII, BORING NO. 1 D^pth (feet) 0.0 Material - 0.5 0.5 1.0 - 2.1 2.1 1.0 - 4.0 4.0 brown - 6.0 6.0 - 8.0 Material Dark gray sandy loam Dark brown sandy clay Brown clayey send Brown sandy clay, mottled Yellow brown silty clay, mottled Water table encountered at -5.5'. SOIL BORING NO. 3 Depth (feet) Material SOIL BORING NO. 2 Depth (feet) Material 0.0 - 1.0 loam sandy clay clayey Dark gray sandy loam 1.0 - 2.2 brown Dark brown sandy clay 2.2 - 3.8 mottling Yellow brown clayey -6.5' brown silty Brown sandy loam sand 3.8 - 8.0 calcareous Yellow brown silty - 1.0 Brown silty clay loam 3.5 - 4.5 clay, mottling at -5.0' Water table encountered at -6.0'. 0.0 - 1.0 Black sandy loam i.0 - 4.0 Reddish brown fine sandy clay 4.0 - 4.8 Brown sandy clay, mottling at -4.0' 4.8 - 8.0 Yellow brown silty clay Water table encountered at -5.01 . ARCEL 3 - S01L BORING NO. 1 Depth ( feet) Material 0.0 1.0 2.0 - 0.5 - 1.0 - 2.0 - 6.0 Brown Yellow Yellow sand sandy brown brown loam sandy clay clayey 6.0 - 8.0 Yellow brown silty clay, clay 1.0 mottling at -6.5' Water table not encountered within 8.0' of surface. SOIL BORING NO. 2 Dei�th (feet) Material 0.0 - 0.5 NO. 3 Brown sandy loam Jam 0.5 - 1.0 (feet) Brown sixty clay 1.0 - 3.5 Yellow brown silty Brown sandy loam 3.0 - 3.5 Yellow brown clay, calcareous 0.5 - 1.0 Brown silty clay loam 3.5 - 4.5 material silty cglay 3.5 - 3.0 - 7.0 4.5 - Yellow brown sandy clay, mottling at --5.1' 7.0 -4.5' - 8.0 Yellow brown silty (-!,Ay Water table encountered at -7.0'. SOIL BORING NO. 3 Depth (feet) Material Depth (feet) Material 0.0 - 0.5 Brown sandy loam 3.0 - 3.5 Yellow brown sandy c4 ay 0.5 - 1.0 Brown silty clay loam 3.5 - 4.5 Yellow brown silty cglay 1.0 - 3.0 Yellow brown silty clay 4.5 - 6.0 Yellow brown sandy clay, mottling at -4.5' 6.0 - 8.0 Yellow brown silty cglayj Iffater table encountered tit -4.0'. O• r GRASS COVER 12'- 18" LOAM SOIL BACKFILL OVER AREA L•100-�• � i. r - �o, 15� DRA;tiFIELD • - TRENCHES 1 -"—'AT 1. .-4r 4 1& -'y ORIGINAL INTERCEPTOR OR CURTAIN DRAIN TO REMOVE EXCESS SOIL WATER op 60 v ' . SOIL TREAOI-MENT UNIT !USING TRENCHES AND CURTA;N DRAIN 0 SHALLOW GROUND SURFACE. r7